fenerstein



' (igo Model.)

` J. FENERSTEIN.

Tmrss. w

Patented Mar; 1B, 1884.l

' No. 295240.r

'I Illivrrn STATES Johannes rnivnnsrnm, on new Yoan, N. v.

TRUSS.

SPECIFICATION forming part of Letters Patent No. 295,240, dated March 18, 1884.

Application iled Nuovcmbcr 14. :1883. (No model.)

oai/.ff whom it may] concern:

Be it known that I, J oHllnNns FnNnnsrEiN, of the city and county of New York, inthe State of New York, have invented a new and useful Improvement in Truss-Pads, of which the following is a specication.

My invention relates to that class of truss- 4 pad which has a sheath or covering of indiarubber.

My invention consists. essentially, in atruss-` pad composed of a solid body or block and a flexible india-rubber sheath or covering een tered upon said body by a projection on the one entering a recess in the other, as more fully hereinafter described, the said sheath or covering conforming in shape'to the i'ace of the body or block, fitting in contact therewith at all points and secured thereon by its elasticity.

In the accompanying drawings, Figure l is a sectional view of a plate or portion of a dou ble truss carrying tWo pads which embody my invention. Fig. 2 is a face View of the body-piece or block which forms a part ofthe truss. Fig. 3 is a face view of a body or block of slightly modified form; and Fig. 4 is a sectional view of a pad embodying my invention, but slightly modilied in construction.

Similar letters of reference designate correspending parts in all the iigures.

In all cases I make my pad oi' a solid bodyor block, A, and a sheath or covering, B. The body or blocl; .A may be made of Wood or analogous rigid material, and has a convex face and a back which is approximately flat; but the sheath or covering B is made of flexibleindiarubber, and conforms in shape to the face of the body or block, so that it Willv ing it right side out over the block, I connect in the other. As shown in Fig. 1, the projec- PATENT Ormea;

tion c is formed on the rubber sheath or covering, and the recess b in the face of the body or block; but a similar result would be obtained if the recess were formed in the sheath or covering, and the projection on the face of the bodF or block, and less rubber would be requirec in making the sheath or covering.

In order to economize rubber, I may form an 6o annular projection, a', on the inner side of the sheath or covering, and the body or block may then have `an annular recess or groove, b', formed in it to Vreceive said annular projection, such construction being shown in Figuli.

The body or block A may be circular, as shown in Fig. 2, or'it may be elliptical, as sh oivn in Fig. 3, or of any other suitable shape, and the recess b may be round, as shown in Fig. 2, or elongated, as shown in Fig. 3. 7o

In some cases, Where additional pressure is desired on a very small'suriace, I i, y provide the sheath-or covering B with an external projection, c, as shown in Fig. l, and such projec tion may be formed integral with the sheath or covering, or attached thereto in any suitable way.

The improved pad herein described is desirable because of its simplicity and small cost, and while lbeing sufficiently rigid it is 8o still somewhat yielding, because of the indiarubber sheath or covering, which conforms in shape to the body or block and issupported thereby.

C designates a piece or plate of metal to which the two pads of a double truss are secured, and which may overlap the edge of the sheath or covering, as shown in Fig. 1, and secure the same. The piece or plate C may be secured tothe pads by screws d, in the go usual way.

The pad or pads may be finished by covering With chamois-leather.

I am aware that it is not new to make a trusspad of a disk of sheet metal struck up into concavo-eonvex forni and covered on both sides, or throughout its whole surface both inside and outside. I am also aware that it is not nenT to make a trusspad oi' a back consisting of a series of radial springarms con- Ico ynecteo'l to a central metal plate, the springs and central plate being bent so as to give them a donie-like figure, a spiral spring bearing on the central plate, and a covering of vulcanized india-rubber. I do not claim either of the pads above described as inclu ded in my invention. My pad is composed of only two partsnamely, a solid body or block, A, having a con- Vex face and an approximate] y dat back, and a sheath of india-rubber conforming to the face of the body or block and iitting in Contactv therewith at all points. Such a bodyfis much less expensive than a body of thin metal struck up to give it the desired shape, and a solid body or block is more durable than a body or skeleton consisting of a plate having radial spring-arms and a spiral spring bearing on said plate.

What I claim as'niy invention, and desire to secure by Letters Patent, is

described, the said sheath or covering conv forniingin shape to the face of the body or block A, fitting in Contact therewith at all points and secured thereon by its elasticity,

snbstantially as set forth.

` JOHANNES FENERSTEIN.

L VVitn-esses:

FREDK. HAYNEs, ED. L. MORAN.

Correction in 'Letters Patent No.' 295,246. -I

to make it conform to the reord of the case in the Patent Oce.

l Ountersigned':

Affidavit having been ied showing that the name of the pabeutee of Letters Patent No.'295,240, granted March 18, 1884, for an improvement in Trusses, should haee been writ;ten and printed Johannes Feuerstein, instead of Johannes Feuerstein it herebf,r certified that the said Letters Patent should be read with this correction therein Signed,'oountersigned, and sealed this 22d day of uly, A. D. 1884. .i

{SEAL} M. L. JosLYN, L

Acting Secretary of the Interio BENJ. BUTTERWORTH, yG Uammssioner of Patents. 

